M 4.6 earthquake near 北太平洋 (日本) — 1981-08-21

Magnitude 4.6 earthquake near 北太平洋（773公里，日本）, depth 509 km, 23:29 Local (1981-08-21 14:29 UTC). Shaking felt by 0 people. Readings from every reporting agency, affected towns, aftershock sequence.

北太平洋（773公里，日本） — 28.004, 139.835

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